Corrugating machine



March 18 1924. 1,486,977

B. J. LINDGREN CORRUGATING MACHINE Filed Aug. 22. 1921 4 sheets-sheet 1March 18 1924. i 1,486,977

B. J. LINDGREN CORRUGATING M ACHINE Filed Aug. 22. 1921 4 Sheets-Shet 2fig. Z.

4 N' g ZvenU/ March `18 1924.'

t B. J. LINDGREN CORRUGATING MACHINE Filed Aug. 22. 1921 4 sheets-shea 4Patented Mar. 18, 1924.

BROR J. LINDGR-EN, OF BUFFALO, YORK, ASSIGNOR TO. NIAGARA. MACHINE &TOOL WORKS, 01E' BUFFALO, NEW YORK, A CORPORATION.

CORBUGATING MAcHrNE.

Application med August z2, r1921. serial No. 494,044.

To all whom z'z may concern:

Be it known that l, Bron J. LINDGREN, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented new and useful,v

Improvements in Corrugating Machines, of which the following is aspecification.

This invention relates to a power driven machine for corrugating sheet fmetal rand relates more particularly to a machine for performing theinitial operation upon sheet metal plates which, after undergoing anumber of further consecutive mechanical steps, finally become sheetmetal, corrugated stove pipe elbows or Ls.

One of the objects of the present invention is to provide a machinewhich may be adjustably altered so as to produce plates of differentsize and having a diiferent number of corrugations so as to enable thesame to be fabricated into stove pipe elbows of different commercialsizes. A further object of the invention is to produce in said plates,

not only a plurality of longitudinal corrugations, but also offsetcorrugations as well, so

as to permit said plates to be subsequently curled into cylindricalshape with their overlapping edges fitting together snugly and smoothly.

In the accompanying drawings: Figure 1 is a front view of the completecorrugating machine, partially in section and taken on line 1 1 Figure2. Figure 2 is'a top plan view of the machine. Figure 3 is a left endelevation of the same, partially in section and taken on line 3-3 Figurel. Figure fl is a vertical, transverse section through the Inachinetaken on line 4F-4L Figure 2. Figure 5 is an enlarged, vertical,longitudinal, fragmentary section through the upper and lowercorrugating rollers and taken on line 5 5 Figure 4L. Figure 6 is anenlarged, substantially vertical, longitudinal, fragmentaryv through therollers taken on line 7 7 Figure,

5. Figure 8 is a very greatly'enlarged, vertical, longitudinal,fragmentary section through the rollers taken on line 8--8 Fig-' ure 7.Figure 9 is a fragmentary perspective view of a typical corrugated metalplate such as produced by the machine. Figure 10 is a fragmentaryvertical transverse sec` tion somewhat similar to Figure 7 but showingthe construction of the removable offset blocks and taken on line 10-10Figure 5. Similar characters of reference indicate corresponding partsin the several views.

Figure 9 illustrates the product which the machine produces and whichconsists of a plate 10 of sheet metal provided with a plurality oflongitudinal corrugations or corrugated ribs l1 and a plurality ofoffset corrugated ribs 12 (see Figure 8) formedat the one end of said'longitudinal ribs. The said corrugated ribs 1'1 and 12 stop short of theopposite ends of the plate and thereby form flat end extensions 13. Thewidth of said eX- tensions (i. e., the distance across the same measuredtransversely ofthe ribs 11) is the same for all ordinary sizes of stovepipe elbows. Also the length of the offset corrugated ribs 12-is thesame for all ordinary sizes of stove pipe elbows. The total overalllength and widthof the plate 10f' and also the'number of corrugated ribs11 and 121are, however, somewhat different for the different sizes ofpipe elbows. To produce or corrugate these different sized plates on theone machine is the principal obj ect ofthe present invention. y

14 represents the main frame of the machine in which are suitablyjournaledl an upper corrugating roll 15 and a lower corrugating roll 16,said rolls being disposed hor` bearing box 21, and upon'v its eXtremeouter v end, is journaled alarge driving'spur gear sus` 22. The lattermeshes with a plnlon'gear 23 mounted on a jack shaft 24,*whi'chv latteris suitably journaled in4 thefmain'framev of the machine Vand carries'adriven. spur gear 25 at its inner end. The latter gear, in turn, mesheswithV a driving pinion 26 mounted on a pulley shaft 27 which is suitablyjourn'aled'inlthe main frame of the machinefand carries the customarytight and loose pulley wheels'29 Vand 30 at its outer end, the samebeing suitably belted to any available source of power. The engagementof the driving belt (not shown) with either the loose or the tight beltpulley 29 or 30 as the case may be is controlled by the usual pair ofbelt tongues or arms 31 which are secured to a longitudinally-slidable,square shaft 32 actuated at the opposite end of the machine by asuitable belt-control lever 33 which is pivoted to the main frame of themachine at 34.

Arranged upon the lower, corrugating roller shaft 20 is a clutch 35,which is actuated by a suitable bell-crank lever 36 pivoted to the mainframe of the machine at 37. This lever 36 is operatively connectedthrough a link 39 with an outer arm 40 secured to a short, stub shaft 41suitably journaled in one of the end plates of the main machine frame.The inner end of said stub shaft carries an arm 42 which is operativelyconnected, through a suitable link 43 and arm 44, with a long,horizontal, longitudinal, pedal shaft 45 which extends the full lengthof the machine frame and is suitably' journaled at opposite endstherein. Thisy pedal shaft is provided near its one end with asubstantially horizontal, forwardly extending pedal 46, which isnormally held resiliently in its upper position by means of a suitabletension spring 47 (or otherwise), whose upper end is secured to the mainframe of the'machine (see Figure 4).

When the machine is in normal operation, the pulley shaft 27 and thejack shaft 24 and also the large driving gear 22 are all rotatingconstantly, but the rest ofV the inachine is idle. Now when the.operator of the machine desiresto impart motion to the corrugatingrolls 15 and 16, he depresses the pedall 46 which actuates thebell-crank lever 36 and also the aforementioned clutch 35, therebypower-connecting the large driving gear 22 to the lower corrugating rollshaft 26, and causing the latter to rotate. By mcanswhich are well knownin the art and do not concern the present invention, this shaft 20 isalways brought to a stop in the same position and is only permitted torotate one revolution for each depression of the aforesaid pedal 46. ltis thus evident that the corrugating lrollers 15 and 16 remain at rest(in the position of Figure 4)y until the operator depressesthe pedal 46,whereupon both of saidrollers make one complete .revolution and againcome to rest.

Secured to the main frame of the machine is a forwardly projecting,horizontal table 5() upon which the operator places the blank of sheetmetal which is to be'corrugated, said blank being properly positionedthereon by a side locating block or stop gauge 51 and a lengthwise gaugeor front stop bar 52. The

latter is adjustably movable forwardly and backwardly and is rigidlysecured to a horizontally slidable cross-head or guiding plate 53 whoseopposite longitudinaly sidesr bear snugly against the inner verticalwalls of a guide 54 formed in the upper face of the table 50. By reasonof this guide 54 and cross-head 53, the front stop bar or gauge 52 iscaused to remain parallel at all times to the corrugating rolls 15 and16. Said gauge 52 is adaptedV to be secured in any desired position bymeans of adjusting bolts 55, whose sh anks are received within suitableslots 56 and whose heads are adapted to bear upwardly against the undersurface of the table 50.

A portion of the periphery of each of the corrugating rollers 15 and 16is a smooth, cylindrical and unbroken` surface 57. The said cylindricalsurface, however, of neither of said rollers ever touches the sheetmetal plate 10 (see Figure 4). Formed upon each of the corrugatingrolls, adjacent to 'the said cylindrical surface 57 thereof, are aplurality of longitudinal corrugations 59 which extend a considerabledistance around the periphery of each of said corrugating rolls andextend substantially the full length of the same. Also formedlongitudinally in each of said corrugating rolls and disposedinterm-ediately of the longitudinal corrugations 59 and the cylindricalsurface 57 thereof, are a plurality of flat recesses. 60 whose bottomsare disposed obliquely relatively to a radius theoretically drawntherethrough from the axis of rotation of the companion corrugatingroll. Adapted to be arranged in said recesses and suitably secured inplace by cap screws 61 are a number of detachable, corrugated bars 62having two corrugations formed on each of the same. Also adapted to bedisposed', if desir-ed, in one of the said recesses 60 of each of saidcorrugating rolls 15 and 16 is a modified detachable, corruA gated bar63 having only one corrngation formed on the outer face of the same.YWhen the machine isL being set up for producingcorrugated metal sheets1() intended to be Vsuitable for fabricating the smallest size of stovepipe elbow, then both the corrugated bars 62 and 63 are removedentirely. lf, on the other hand, it is desired to produce a largersizeof stove pipe elbow requiring, for instance, the addition of an evennumber of corrugated ribs 11, then one or more bars 62 are placed inposition in the aforesaid recesses 60 and secured therein by the screws61. If, however, the desired additional number of corrugated ribs 11 isan odd number, then one of the single corrugation bars 63' is employed,and (if also required) one or more of the double corrugated bars 62 inaddition thereto. (See Figure 10).

` Formed in the corrugating roll 15 at one end of the longitudinalcorrugations 59 thereof are a plurality of outwardly olfset corrugations64 which are of substantially the same shape as, and are longitudinallyin line with, said longitudinal corrugations 59, but their inner endsare disposed outwardly somewhat therefrom, i. e., further outwardly fromthe axis of said roll 15. These outwardly offset corrugations 64 may bemade integral with the main body of the corrugating roll, but forpurposes of manufacture, the same are preferably construct-4 ed, asshown, on the periphery of a separate, offset corrugation collar 65which; is preferably press-fitted over the reduced end or journal of thesaid roll 15. Cooperating with said outwardly offset corrugations 64arranged upon said upper roll are a plurality of inwardly offsetcorrugations 66 arranged upon the lower roll, the inner ends of saidcorrugations 66 being disposed inwardly of the main longitudinalcorrugations 59 of the lower roll, i. e., closer to the axis of rotationthereof. it is the co-l action (see Figure 8) of these outwardly offsetcorrugations 64 and inwardly offset corrugations 66 which produces theoffset corrugated ribs 12 of the metal plate 10 heretofore described.The purpose of said ribs 12 is best comprehended when it is understoodthat after the initial operation upon the sheet 10 has been completed bythe hereindescribed corrugating machine, that said she-et 10 is curvedup into a cylindrical tube the axis of which is transverse of the ribsl1, and with the aforesaid offset ribs 12 overlapping the oppositeextreme ends of the said ribs 11. It should be noted thatv in any sizedsheet 10 whatsoever the number of ribs 11 and 12 are in all cases equalto each other. rlhis means merely that, when. a certain number ofcorrugated bars 62 and 63 are added to or removed from the corrugatingrolls 15 and 16, a like number of outwardly, offset, double-corrugatedblocks 70, (and perhaps, in addition a single-corrugated, outwardlyoffset block 71) are added to the upper corrugating roll 15 and the samearrangement and number of inwardly offset blocks 72 and 73 added to thelower corrugating roll 16. These offset. blocks are received withinlongitudinal recesses 74 which are formed adjacent to the outermostoffset corrugations 64 and 66 respectively and similarly to the mannerin which the corrugated bars 62 and 63 are received within the recesses60, and similarly secured therein by cap screws 75.

The manipulation of the machine is as follows: The operator rst movesthe belt lever 33 from its dotted line position to its full lineposition, thereby shifting the usual flexible driving belt (not shown)to the tight belt pulley 30. Then he places a blank piece of fiat, sheetmetal (previously cut to a proper length and width) upon the table 50 inthe position indicated in Figures 2,

3, 4, and 5, with its outer edge or rear bearing against the inner faceof the gauge 52 and its left edge positioned by the side gauge 51. Inthis position the fro-nt portion of the said blank extends forwardlythrough the interstice between the rollers 15 and 16 (seeFig. 4)without, however,`

and rear parts 13 of the sheet or plate 10 l are, however, leftuncorrugated, these portions 13 `going lto make up the male and femaleends of the stove pipe elbow which ends are formed during asubsequentoperation upon the sheet 1() and permit the completed sto-vepipe elbow, in the usual and well kno-wn manner, to slip respectivelyinto and around the adjacent male andl female ends of adjacent stovepipes, so as to effect a smoke tight junction therewith. If the operatordesires to alter the machine, so as to produce either larger or smallerplates 10 and create a larger or smaller number of corrugated ribs 11and 12 thereon, then he adds to or removes from both rollers 15 and 16,a like number of double corrugated bars 62 (and if necessary the singlebars 63) andV also theV offset double corrugated blocks and 72 (and ifnecessary the single corrugated blocks 71 and 73). These bars andblocksv are ldetachably held in their obliquebot-4 tomed recesses by theseveral cap screws 61 and 75. It is obvious that for larger or smallersizes of plates 10, the gauge bar 52 must be set either rearwardly orforwardly, and locked in position by adjustment bolts 55, but the ysameis always retained in a position parallel to the corrugating rolls 15and 16 by reason of the co-action ofthe sliding head 53 and guide 54.The longitudinal position of the end gauge block 51 is, however, nevershifted, because the'overlapping orolfse-t corrugated ribs 12 are of thesame ylength for every size of stove pipe elbow;

The length ofthe corrugated ribs 11 of any sized `plate 10 is determinedmerely by the overall width of said plate. For small plates, such asshown in Figure 5, the right edge of the said plate 10 does not extendover to the righ-t end of the rolls, and the extreme ends of theco-rrugations 59, in such quired to produceeither larger or smallerplatesk for the different sized stove pipe elbows.

l claim as my invention:

l. A corrugating machine comprising a pair of cooperating corrugatingrolls each having a plurality of integral, 'longitudinal corrugationsformed on its periphery and also having a4 plurality of longitudinalrecesses having obliquely formed buttons; and a plurality oflongitudinal corrugated. bars adapted to be disposed Within saidrecesses.

2. A corrugating machine comprising a pair of co-operating corrugatingrolls each having a plurality of integral, longitudinal corrugationsformed ou its periphery and also having a plurality of longitudinalrecesses having obliquely formed bottoms, said bottoms being dis-posedat equal angles relatively to a radius drawn through each of the saine;and a plurality of longitudinal corrugated bars: adapted to be disposedWithin said recesses.

3. A corrugating machine comprisinga pair Lesage?? of co-operatingcorrugatingrolls eachhaving an integral longitudinal corrugation and anoffset corrugation and also having a longitudinal recess and a loca-tingshelf disposed longitudinally in line With each other; acorrugated baradapted to be `disposed in said longitudinal recess; and an offsetcorrugated block adapted to be dis-poised upon said loeatin shelf.

4. corrugating machine comprising an upper corrugating roll havinglongitudinal corrugations and inwardly oilfset corrugations located atone end of said longitudinal corrugations; a corrugated bar arrangedadjacent to said longitudinal corrugations of said upper roll; aninwardly oil'set corrugated hlock arranged adjacent to the said` in-Wardly offset corrugations oi' said upper roll; a lower corrugating rollhaving longitudinal corrugations and outwardly oiiset corrugations; acorrugated har arranged upon said lower roll; and an outwardly oii'- setblock arranged upon said lower roll.

BRQR J. LINDGREN.

